Baby stroller



FIG. 1 is a side perspective view of a baby stroller showing my new design;

FIG. 2 is a front perspective view thereof;

FIG. 3 is a rear perspective view thereof; and

FIG. 4 is a side perspective view thereof showing a folded condition, the other side view being a mirror image of that shown. 

The ornamental design for a baby stroller, as shown and described. 